HomeMy WebLinkAboutKENSINGTON SOUTH - Filed CS-COMMENT SHEETS - 2004-08-12March 10, 1977
TO: Dick Rutherford, Stewart & Associates Consulting Engineers
FROM: Don Parsons, City Engineer
RE: Kensington South Subdivision
In addition to those comments for which revisions and design considerations are
requested on the check prints for the Kensington South Subdivision, a complete
drainage report is requested.
It is requested that the drainage report be submitted on 8," X 11" size paper along
with the drainage plans. The information listed below, if not shown on the draw-
ings, is to be included in the report.
1. Runoff calculations and method of analysis for both the initial storm and
the major storm, submitted in tabular form.
2. Storm sewer and storm inlet flow calculations for initial storm and major
storm runoff.
3. Culvert design flow calculations for initial storm and major storm runoff.
4. Street capacities and flow calculations at critical street sections for
initial storm and major storm runoff.
5. Smmtion of all design variables used and design assumptions made.
6. The boundary and designation of all tributary drainage areas and the area of
each in acres.
7. The designation and location of each design point referred to in the calcu-
lations.
It is requested that an overall drainage design plan of the study area, including
all areas outside the study area which contribute runoff to the study area be
submitted. Drainage design plans should include the following information:
1. Contours (twa foot contour interval proposed and existing) on USGS Datum.
2. Property Lines.
3. Streets, names and grades.
4. Existing drainage facilities and structures, including existing irrigation
ditches, roadside ditches, drainage ways, gutter flow directions, culverts,
etc. All pertinent information such as size, shape, slope, location, etc.,
shall also be included to facilitate review and approval of drainage plans.
Page 2
Date: March 10, 1977
Re: Kensington South Subdivision
5. overall drainage area boundary and drainage sub -area boundaries.
6. Proposed type of curb and gutter (vertical or combination) and gutter flow
directions, including cross pans.
7. Proposed piping and open drainage ways, including proposed inlets, manholes,
culverts and other appurtenances.
8. Proposed outfall point for runoff from the study area.
9. Routing and accumulative flows at various critical points for the initial
storm runoff.
10. Routing and accumulative flows at various critical points for the major storm
runoff.
11. Critical minimum finished floor elevations for protection from major storm
runoff.
It is further requested that the design plans be a submission separate from the
construction plans. The construction plans and details should show the following
information:
1. Plan
North arrow
Property lines
Street names and easements with width dimensions
Existing utilities and structures
2. Profile
Vertical and horizontal grids with scales
Ground surface existing (dotted) and proposed (solid)
Existing utility lines where crossed
Bench marks (USGS Datum)
Elevations (USGS Datum)
3. Proposed Construction
Pipes
Plan and profile showing:
size, type and structural class of pipe, including ASTM specification
grades
inlet and outlet details
manhole details (station number and invert elevations)
Page 3
Date: March 10, 1977
Re: Kensington South Subdivision
open channels
plan showing stationing
profile, including water surface profiles
grades
typical cross section
lining details
Special structures (manholes, culverts, headwalls, trash gates, etc.)
plan
elevation and water surface profiles
details of design and appurtenances
It is recommende3 that the "URBAN STORM DRAINAGE CRITERIA MANUAL" published by
the Denver Regional Council of Governments be used as a guide in designing the
storm drainage system.
Should you have questions or comments concerning this matter, please contact me.
LM:cs